´'Abdullah bin Mas'ud narrated "The Messenger of Allah (s.a.w) drew a square line (on the ground) forus, and in the middle of the (square) line he drew another line, and he drew another line going out of the (square) line.Around the one that was in the middle, he drew (various) lines. Then he said:` 'This is the son of Adam, and this is his life-span encircling him, and this one in the middle in the person, and these lines are his obstacles, if he escapes this one, this one ensnares him, and the line extending outside is his hope.'"
Hadith Referenceسنن ترمذي / كتاب صفة القيامة والرقائق والورع عن رسول الله صلى الله عليه وسلم / 2454
´Narrated 'Ali bin Abi Talib:` that he said: "O Messenger of Allah (ﷺ)! If I have a son after you do you think I could name him your Kunyah?" He said: "Yes." So he said: "So that was permitted for me."
Hadith Referenceسنن ترمذي / كتاب الأدب عن رسول الله صلى الله عليه وسلم / 2843